Automatic lubricating system



July 21, 1936. W. K. HAWKS 2,048,003

AUTOMATIC LUBRI CAT ING SYSTEM Filed Aug. 22, 1932 s sheets-sheet 1 Grza 5 e 3 P. 90 Pump IVI o far ATTO RN EYB July 21, 1936. WK HAWKS 2,048,003

AUTOMATIC LUBRICATING SYSTEM Filed Aug. 22, 1952 5 Sheets-Sheet 2 INVENTOR ATTO RN EYS July 21, 1936. w. K. HAWKS AUTOMATIC LUERICATTNG SYSTEM Filed Aug. 2.2, 3.932 5 Sheets-Shea?l L L 2 T LLI v IN VE NTO R MRW/13122 [C Hawks ATTO RNEYS Patented July 2l, 1936 PATENT OFFICE AUTOMATIC LUBRICATIN G SYSTEM YWilliam K. Hawks, Cleveland, Ohio, assignor, by Y mesne assignments, to The Farval Corporation,

Cleveland, Ohio, a Vcorporation of Ohio Application August 22, 1932Serial No. 629,768

18 Claims.

The system is designed particularly for use in connection with the so-called dual line valves wherein lubricant under pressure is delivered to the valves rst through one line and thenthrough another line. The uid under pressure is delivered to the lines from a single source such spective lines by means of a suitable valve.

In the system constituting this invention, the valve is operated by a motor which in turn is started at regular intervals bymeansof a time switch. The grease pump is also actuated by aV 20 motor in another circuit which-howevercontains a normally open relay.` `Switches for' closing this relay are associated with the valve motor and are closed selectively when the-valve motor has adjusted the valve to a new open 4position. The pump thus Vsupplies lubricantunder pressureto the lubricant linesat this time.

The same switches are also incorporatedinthe valve motor circuit in such a manner as to open this circuit and stop the valve motor when the valve reaches its newl adjustment.` Thus,

the valve motor and pump motor do not operatel simultaneously but successively The system also embodies automatic means for stopping the pump motor when the bearings have been lubri-` cated. This means consists of a control valve which operates to throw a switch and open lthe pump motor relay after a predetermined pressure has been built up in the lines. This predetermined pressure is atleast equal to the lubri-V cant pressure necessary for lubricating Ythe tight` est bearing in the lines, so that the control device is not operated and the grease pump motorn is not stopped until this bearing has been lubri-fu cated.

The invention is fully disclosed by wayio'frex-4 ample in the following description and in the4 accompanying drawings, in which- Figure 1 is a Wiring diagram ofthe system;

Fig. 2 is a longitudinal section of the control valve unit;

Fig. 3 is a detail elevation of -the f oureway valve operating mechanism;

Fig. 4 is an enlarged section on the linel4-f4 i 55 oi Figure 3;

as a pump and is directed alternately to the re-v (cl. isi-ry Fig. 5 is a wiring diagram of a modined construction; and I Fig. 6 is a sectional view of the adjustable ac-4 cumulator. l

Reference to these views will now be made by 5' use of like characters which are employed `to designate corresponding parts throughout.

'The system as a whole is an improvement and simplication ofthe automatic system disclosed in the co-pending application of Hawks and Jenl0 nings, Serial No. 506,602, filed January 5, 1931'."

' The mechanical parts of the system will iirstv be described, and then the wiring will be considered. The numerals I0 and II indicate two lines adapted to supply lubricant to a series of l5 measuring valves I2 `which are connected as at I3 to bearings or other parts to be lubricated. These valves are of the dual line type, requiring pressure in lines I0 and II alternately for their operation', and may be of the single acting type 20 as disclosed in the co-pending application of Kerns, Serial No. 341,958, led February 23, 1929, v issued May 29; 1934 as Patent No. 1,961,051 or4 of the double Vacting type as disclosed in the application of Jennings, Serial No. 462,765, filed 25" June 21, 1930, issued Oct. 8, 1935 as Patent No.V 2,016,372. I Y

\ .The lines I0 and II lead from a four-wayvalve.' for alternately supplying lubricant under pres sure -to the lines, and this valve comprises a 3'0 cylinder I4 to which two other lines I5 and I6 are connected, alternating with the lines I0 and II. Thelines I5 and I6 extend respectively from the high pressure and low pressure sides of a grease pump I'I which in turn is driven by an 35'l electric motor I8' of approximately three horsepower. In other words, the line I5 is adapted to supply .lubricant under pressure to-Athe valve casing I4, while the line I6 isa returnpassage to the reservoir or low pressureside of the pump. 40 The cylinder I4 contains a valve plug I4 which is so recessed as to connect the pressure line I5 with one or the other of the lines I0 and II, whileat the same time connecting the other line I0 or II to the return line I6. Thus, by ad- 45 justment of the valve plug through the-means presently to be descibed, the fluid underpressure delivered by the line I5 may be'transferred toV either linerl or II, while the remaining line I0 or I I is relieved through its communication with the return line I6.

VBoth lines III and II terminate in a control valve comprising a cylinder 20 in which is slidably mounted a piston 2|. Rods 22 and` 23A extend fromrthe piston through the ends ofthe 29 having'end heads 3U and 3l and aninterrne`V diate head 32.

The enlargement 25 is further formed a' pair of passages 33 and 34,4 between theducts12:1-y

and 28, connected respectivelyto the l-i'rfes,A '[8 andY Il by bypasses 35 and 36 respectively. AtfeachY of the passages 33 and 361fisno'rrned-aflfiousing:tlf`

for a spring 38, and upon each spring is mounted a valve pin 39 adapted to cover the joint between the .corresponding passage@ 13,4. and; the associated bypass 35 .or 36. The head issqpqsige tiopedetloatfitalways"liesfbetvveerrtirefpessae ..33

and 34 to prevent direct connnunicationjther e.

timer-1., Y .A .Whe .there Viszpressiire in the line. l l.-,. thel valve rod V29 .1. moi/ed. to the left in yFieirre.. thereby opepipathefductz. tothe portion of. .theopassage 2.6. which. is supplied with. luloricairt fr-0.1.1.1; l; l..

30.1andclosingthefductlttothe lirici-lll. v. The 'prese sure inthe. cylinder 2.!! tends to move the. piston;

2.1; to the left but this movement. cannot. ,take

place uptilfthe pressure is. sufficient to.V conseille;

valve-pip `3.4!; to move and. uncover theA ioiptloe.-

'. .tween the .passages 3?;t and. 3.5.againstfthe action. the corresponding spring f3.8,l since this. joint;

pressurerelief; line.V The. reverse operation by l. 'theline l0 its eirtremeriaht position. ande 'suicient pres: snre; in the -line' lv-'ultimatelycauses the. corree.I spending valve` pinto, uncover-fthe. f1'oirit;'betweenh ther-passage 53.4;-end1 lloypass. 36;-. It isdesiredathat 4.5.,iileeorrtrol.valye,v which governstheoperation of; the.svsirerrrvv shall not. operate :untilf a ypredeter-.t mined pressure has been developedthereintjthis. presSurebeipeat leastfequivalent of theffresistanceof fthe. bearings. to the introductiony of.V lubre.. 50, cant herein. 'lhc.cor1trol;valvedoes not operate: )untill netof theisprings 3.8,-is compressed, and-the` ten ion ofthese springsdetermines the".fluidnpresf--` Sureetw ichthe'pistonfzliwillfberdisplaoed; .The tension@ Qithelsprines may fbe-adiustedvasf desired. 5a x order-to; turn thea valvek plus. M', e. motor? 4.0 of; eQO.iit.;.one.-sixtlr horsepower is.- 'operativelyv` @reacted theretoflov-a crank shaft 41|. Theshaft: atom-close aper; fr ngrrnallyopen starting switches.Alfandv B1'. ationeo. V.es thereof- 1 l v i 'Y t y fent is` supplied to thegrease pump-motor |8 frorntlie mill circuit which comprises.- threej 1i.I-.1eSfX- Y.; Z.. with famain hand switch 4.3; intere. posed. 'Ijhewiresl pass.V` throughlvan, automaticz Stef ea pepe1- 44; where theyare. interrupted et.' 4.5 Q11 the parchis also.mouptedrastarteerelav .ewhich.;Wherreriereizedby-the:meanssprcse 8.1.1151....i9fbedescribedfcloses the gaps 4ii.sandteome.V p letesthe circuit'to the. IriQilOrl I8. Y On the panel? 70,;- 4 areposts arid-ceto. which-the. ends of the.E

'coil are joined by conductors andglti;-respecmoves the. .valve .rod :2.9. to.

46) and rto the Vconductor Z. The main control panel 5| supports any electric clock and time switch generally designated by the numeral 52 and operated by alternating current. This cur-V rent is supplied from conductorsV 53 connected to A5 a pair of posts L1 and L2 on Vtheipanel.AVV In this line are interposed a relay switch 54 closed by current; owing in the mill circuit, 'a suitable transformer 55 :and a safety fuse switch 55. .The

clock has fourY terminals 5l, ,58, 59, 50, and the l0 posts L1, L2 are connected to the terminals Sil and =59,"by lines l1, Z2 respectively.V The winding 6l of ltlnegcloelg .motor is comprised in a conductor 32V which also has its ends connected to the termilna'ls l59, i60-e Y'5L-he 'timeswitch comprises contacts 15 5 3.'ilwhiclfr'farebrought into engagement at regular intervals bythe operation of the clock, and these;contactsfarejoined to the Vterminals 58 and 51 by conductors 55 and 65 respectively.

' lAn'auxi'liary relay AR is mounted on the panel 20 one comprises, e. normallpopep pair of contacts 6,1'Y ncl-eJ oi1;-68fha,ving its ,ends joined tothe tere In vcl 6,llbycon'ductors 69 andlll respec-V tve15r.. gThe terminals 58.1 ami 59 ere joined to-f esther-Jerashortconduetor 1:1.- When the switch 25 6.3-, (itis.zeloseelthereley closes by acurrerit.v owing from post L1 alQIig. conductor Z1, terminal. 5.0.. @Git-ductorl'.. relay coil.. conductorV es, terriginal -5.-`L ffswito.h contacts 64., 63'.. to terminal e8.:

conductor 1.4 tofterlrrnel, and. conductor z2 to 30 postLz-.f Y Y f Qrrthe panel.51%isa1somounted a motor relay hoi/ipa. pormallnspoced ,contacts 12 joined;

respectivelyz-gtctthccontacts 5 7' by conductors T3.

and '[4 'lhecpilfl5gV of; this,V relay has oneend 35 Y tlpped- @11.0 the? QQIldllQlor .Zi by a vconductor vr'I6 ami-fits; other' .end tapped "ini-toV the conductorfit` by acengiuetor 1.1. Apnor-'mally closed relay ANCR. is also'lngunted onthe panel and'hasits contacts 1.8joined respectivelyintothe conductor 'i3 by a4() Y conducto '13 a .nd,tro;th e pp stLz by a conductor 80.

.WhenLgrelay-I AB. is, closed; as previously de- Y .TelV CQlilleidHConductors?3- and 79 to normally'clphsedgcontacts 18 and conductor 8B. tdpost'Lz.

Y'Il1e panelfurthercarries two more sets of postsl I i rand (312,.n The f orm'er are joined by nectsthe'post fligintpthe linefl, and another line connect thepostTzfinto the line 'M'.

fighe motoiglrrelay--MB now being closed, closes .55.

a circuitlrthrrough the motor lMijas follows: Post 'ltthe'contactsl'l'o'f the normally closed relay 70.

NCR and conductor 88 to post L2.

)Anim-em leadslfrom-me post l and isfbr'anehed at 88 Vand 89 to a contact r`of each of the limitV switchesA and'B'at opposite-sides of the control valve. From the post 2 extends a line 98 whichi'V is'branched at 9| and 92 to a terminal of each of the normally open switches A1 and B1 at opposite sides of the cam 42. The remaining terminalsof the switches A, A1 are joined by a conductor 93, and in like manner the remaining terminals of the switches B, B1 are joined by a conductor 94.

It will be recalled that the grease pump motor circuit is normally open until the starter relay 46 is energized, and up tofthis point the relay has not been energized. The motor 4D, having been started as already described, continues to run until the cam 42 engages and closes one of the normally open switches A1, B1, for example the switch B1 in this case. Either switch-closing position of the cam is accompanied by a setting of the four-way valve plug I4 to connect the pressure line I5 to one or the other of the feed lines I6 and II. The closing of the switch B1 energizes the relay coil 46 and closes the gaps 45 by a circuit as follows: conductor Y, through conductor 48 and coil 46 to conductor 49 and post I, conductors 81 and 89 to switch B, conductor 94 to switch B1, branch 92 and conductor 99 to post 2, and conductor 59 to line Z. On closing of the circuit X, Y, Z, the grease pump motor I8 and grease pump Il are set in motion to deliver lubricant under pressure to the line I5 and the four-way valve.

On establishing a current path between the posts I, 2, through the switches B, B1 as just described, the coil 95 of the normally closed relay NCR is also energized. 'I'he ends of this coil .an-'auxiliary circuit after AR opens.

are connected to the posts C1, C2 by conductors 96- and 91 respectively. The circuit is as follows: Conductors Y and 48 to post c2, conductors 84 and 91 to coil 95, conductors 96 and 83 to post c1, conductors 41 and 49 to post I, post I to post 2 (through switches B, B1 as previously described) and conductor 55 to line Z. With the opening of relay NCR by the energizing of its coil 95, the circuit to the motor 49 is opened, inasmuch'as this circuit passes through the contacts 'I8 of relay NCR.

The grease pump il continues to operate, and when a predetermined pressure is developed, the rod 23 engages the iinger 24 of switch B and opens this switch, thereby opening the circuit to the'starter coil 46 but at the same time disengaging and closing the switch A for the next operation. With the opening of the starter coil circuit, the mill circuit XYZ is also opened, and the pump II stops. The opening of the switch B also opens the circuit to the coil S5 of relay NCR, so that this relay again closes.

vThe system is now idle but in readiness for another operation when the time switch 63, 64 is next closed. The various circuits are closed by the relays in the manner already described,

except that switch A is substituted for switch B and the cam 42 ultimately closes switch A1 and leaves switch B1 open. Further, the four-way valve is adjusted by operation of the motor 40 to connect'the pressure line I5 to the line I0 or II which was previously in communication with the return line I6. In this operation, on the attainment of a given pressure in the control 'valve, the switch A is opened and the grease pump stopped,the rods 22 and 23 being now returned, after two operations, to the starting position illustrated in Figure 1.

To summarize, the -time clock switch 63-64 closes auxiliary relayAR. AR closes motor relay MR which maintains itself energized through MR starts valve motor 4|). Valve motor closes A1 or B1 and circuit is completed through A or B to close starter relay 46, 45 and start grease pump motor I8. The circuit through A, A1 or B, B1 opens the normally closed relay NCR and hence the 5 circuit of valve motor 40. Pressure in control valve 20 opens A or B and breaks starter relay 46, 45 and grease pump motor (I8) circuit. The parts are thus set for another cycle on the next closing of time clock switch 63, 64.

In the modied system shown in Figure 5, the timed switch is eliminated, and the cycle of operation is regulated at an adjustable volume device. The main current lines XYZ pass through an automatic starter panel I 44 which provides gaps |45 in the lines. The panel also carries a starter relay coil |46, which when energized by the means presently to be described, closes the gaps |45 in the lines XYZ and thereby starts the operation of the grease pump motor I8.

The posts LL1 and LL2 correspond to the posts L1, L2 in Figure 1, it being understood that an alternating current is supplied to these posts through suitable control elements such as the relay 54, the transformer 55 and the safety switch 25 55 of Fig. 1. This circuit is employed for 0perating a valve motor 40 which corresponds to the Valve motor 4U of Fig. 1. The conductors |8| and |82 leading to the motor contain the contacts |98 of a normally closed relay, the coil 30 |95 of which is connected to the lines YZ by conductors |96 and |97. It will be evident, therefore, that the opening of the valve motor circuit is concurrent with ow of current in the lines YZ or on closing of the gaps I 45 by energizing 35 of the coil |46.

The valve motor 46 is adapted to set a fourway valve II4 to establish ow of lubricant from the grease pump selectively to the lines IIE) and III. The shaft 4| from the valve motor to the valve carries a. cam |42 at opposite sides of which are positioned normally open switches AAl and BB1. One terminal of each switch is branched as at |9| and |92 into a line |99 leading to the conductor Z ahead of the gap |45 therein. A conductor |50 leads from the conductor Y, ahead of the gap therein, to one end of the coil |46.

The lines III) and III are connected into opposite ends of a control Valve |29 which is similar in construction and operation to the valve 20 in Figure 1. It is preferred, although not necessary, to connect this valve into the ends of the lines in order that the pressure necessary to operate the control valve will be exerted in all the lubricating valves. At opposite sides of the control valve are mounted normally closed relays or switches AA and BB corresponding to the members A and B of Figure 1. One terminal of each of these switches is branched at |88 and |89 into a line |81 leading to the remaining end of the coil |46. IThe remaining terminals are joined respectively to the remaining terminals of the switches AA1 and BB1 by lines |93 and |94. Rods |22 and |23 extend from opposite ends of the control valve and are adapted 65 respectively to open the normally closed switches AA and BB by engaging the movable elements |24 thereof.

Finally, the lines H6 and I are placed in fluid communication with opposite ends of an adjustable volume device which in the present instance is illustrated as an adjustable accumulator comprising a cylinder 29S with a piston 28| slidably mounted therein. 'I'he stroke of the piston is regulated by the adjustment of a screw 202. `The 75 stroke of the piston determines the time interval between operations of. the control valve I'Qlas Will presently appear.

In the operation of the device, ljetrt be assumed that the normally closed switch AA is held open, asY illustrated, Vat which'time: the cam i'fli'closes the normally open Yswitch 13331 leaving 'the switch lAA1 open. VA circuit is. .thus completedthrough the relay coil |346; by way of the conductorsV` i8?V and and the closed'switches BB and BB1. The gaps |55 arev thereby closed, startingv the grease pump motor I8' and supplying current to the coil to open the normally closed relay Vcontacts, |98 `and thereby stop the valve motor liti'.

`When there is suflici'ent pressure developed in the fluid system to shift the valve |20, the'switch BB is opened and the .switch AA closed, Vandi, the relay IAEis de-energized, whereupon the gaps le?! are again opened. The normally closed relay |83,

|95 is then permitted to close, andthe valve motor:

40' turns the cam M2 and reverses the four-'way valve ITM. In the movement of the cam M2, the switch AAl. is closed, thus completing circuit to the coil M6 through the switches AA vand AAl. The lgrease pump motor I8 is kthus started andthe valve motor 46 stopped in the manner just described, until the next shifting of.' the' control valve |2B3 opens the grease pump motor4 circuit and permits closing of the valve` motor circuit to reversethe four-way valve: llzll': and close the switch BB1. It will be evident that vthe time intervals between reversals of the four-wayvalve or between operations of the grease `pump motor I8', which are dependent on the development of a given pressure in the control valve |28, are also 'dependent on the volume of the fluid conducting system. The displacement-lof thefpistonI 201| in the cylinder 2m) is comprised in .the volume: of the uid conducting system, and the displacement isadjustable. by means of the screw 2'2.

regulated bvY adjustment of the screw 232. It

will be understood however that'thel'adjustable accumulator Zei), QQZ: is representative of `any ad justable. volume device inserted in the fluid con? ducting system, such as, ferv example, an adjust-- able displacement pump suchi asfthat disclosed". in

the (zo-pending application of C. R'. Burrell, Serialy 1. In a lubricating system, a pair ct lines into which fluid under pressure isto'beY delivered al` ternately,v a pump,` connected to 'said lines for supplying fluid thereto, a valve inserted betweenv said pumpv and said linesfor connectingsaid 'pump to said lines in alternatiorra mctor'for operatingsaid valve, means for starting motor activity, a pump motor for driving said pump,v and; means operable by saidf valvet motor for Vstopping itself and starting said pump motor.` Y,

2; In'a ilubricating-.system, a pair`- of lines into which uid under pressure is ytombe delivered alt'ernately, a1 pump connectedl torsaid: linesV VforA supplying fluidA thereto, la valve inserted between,r

era-ble by said valve motor for stopping itself andr starting said pump: motor,v and a control Valve connected to said lines and adapted.' to open Ythe pump motor circuit. s

.3.. In a'lubricating systemg. a pair of .lines 'into Thus, the time interval betweenv operations of the system may beV which uid under pressure' is to be deliveredai# t ternately, a pump connected to said linesv .for

supplying fluid thereto, avaiveinsertedbetween; V

said pump andl said: lines for connecting said' pump to said lines in alternation, a motor for operating' VYi5 said valve, means for startingmotor activity, a pump motor for driving said pump, meansoperable by said valveV motor for stopping itself andV startingsaidpump motor, and. ai pressure-oper-v ated control Valve connected to said and. 10"y Vpump and said lines for connecting said pump tol said lines Vin alternation, a motor for operating said valve, means for starting motor activity, .apump motor for driving said pump, a switch operable by said valve motor for vopening the valve motor circuit, said switclfr being Valsoy :adaptedz tof close the pump motor circuitV when: said valve motor stops;

5. In a.lubricating'systentuV a pair of lines into which fluid under pressure is to be delivered alj ternately," apump connected to saidflines for supplying iiuid thereto, a valve inserted"`between said pump and said lines Yfor connectingV said" pump to said lines in= alternation, aV motor for 30 operating said valve, means for startingmotor activity, a pump motor for driving said fpump,

a switch operable by said. valve motor for `opening the valve motor circuit, said Vswitch 4being Valsoadapted to close the pump motor circuit when $5V said valve motor stops, and aY control valve con'-A j nected to said lines and adapted to vopen said pump motor circuit. Y

6. In a lubricating system, a pair :of lines intoV which iiuid under pressure isf tob e. delivered alplying fluid thereto, a valve inserted betweerr said pump and saidlines for connecting said pumpto said lines in alternation, avmotorfor operating said valve, means for starting motoractivity', a pumpmotor fordriving said pump, aswitch-op-- erabletby'said Valve motor for opening the pumpmotor circuit, said switch being alsoadaptedto close the pump motor circuit when said valveV motor stops, andv a pressure-operated control Valve connected to saidlines and :adapted ,to'openn said pump motor circuitrbyapredetermined-1pres.;-` sure in said lines.

v '7. In` a lubricating system, a pair of lines into which fluid under pressure is to be deliveredyabternately'a pump connected to said lines fo-rsupplying fluid thereto, a valve insertedbetweenfsaid pump and Vsaid lines for connecting said pump',v to= said linesin alternation, -a motor for operating: said valve, means for starting motor-activity, -al-o pump motor for driving said pump, a. cannopferated by said valve motor, normally open, switchesl at opposite sidesof said Vcam .connectedlV respectively in` said pump motor 4rcircuit4 andi adapted tov be closed Vselectively Whensaid valve65 has been'rnoved to an open'position,l whereby' toV start said pump motor, and-means wherebyeither Yof said switches opens saidrvalve motor `circuit Y when closed by saidy cam. Y

i l 8. Ina lubricating system, a, pair of linesyinto-m which fluid under pressurefis-to be delivered altere nately, a pump connected to said lines. for supplying iiuid thereto, a valve inserted. vbetween saidf ump andv said linesfor' connecting saidpump to said lines in alternation, avmiotonfor 'operatingsaid.,75E

d0 Vternately, a pump *connected tosa-idlines for-'supeV trs.

valve, means for starting motor activity', a pump'Y motor for driving said pump, a cam operated by selectively when said Valve has been moved to an open position, whereby to start said pump motor, means whereby either` ofsaid switches opens-said valve motor-circuit when closed by said cam, and a pressure-operated control valve connected to said lines and adapted to open said pump motor circuit by a predetermined pressure in said lines.

9. In a lubricating system, a pair of lines into which uid under pressure is to be delivered alternately, a pump connected to said lines for supplying fluid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, a cam operated by said valve motor, normally open switches at opposite sides of said cam connected respectively in said pump motor circuit and adapted to be closed selectively when said valve has been moved to an open position, and a normally closed relay in the valve motor circuit, said switches being each adapted to open said pump motor circuit and stop the valve motor when closed by said cam.

10. In a lubricating system, a pair of lines into which fluid under pressure is to be delivered alternately, a pump connected to said lines for supplying iiuid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, a cam operated by said valve motor, normally open switches at opposite sides of said cam connected respectively in said pump motor circuit and adapted to be closed selectively when said valve has been moved to an open position, a normally closed relay in the valve motor circuit, said switches being each adapted to open said pump motor circuit and stop the valve motor when closed by said cam, and a pressure-operated control valve connected to said lines and adapted to open said pump motor circuit by a predetermined pressure in said lines.

1.1.. In a lubricating system, a pair of lines into which uid under pressure is to be delivered alternately, a pump connected to said lines for supplying fluid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, a normally open starting relay in circuit with said pump motor, and means operable by said valve motor for stepping itself and closing said relay.

12. In a lubricating system, a pair of lines into which iiuid under pressure is to be delivered alternately, a pump connected to said lines for supplying fluid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, a normally open starting relay in circuit with said pump motor, a normally closed relay in the circuit of said valve motor, and a switch operable by said valve motor for opening the last named relay to stop the motor, said switch being also connected to said starting relay to close the pump motor circuit when said valve motor stops.

13. In a lubricating system, a pairof lines into J which uid under pressure is to be delivered alternately, a pump connected to said lines for supplying Yfluid thereto, a valve inserted between said pump and said lines for connecting said pump'to said lines in alternation, a motor for operating saidvalve, means for starting motor activity, a pump motor for driving said pump, a normally I open starting relay in circuit with said pump motor, a cam operated by said valve motor, normally open switches at opposite sides of said cam connected respectively to said starting relay and adapted to be closed selectively when said valve has been moved to an open position, whereby to start said pump motor, and means whereby either of said switches opens said valve motor circuit when closed by said cam.

14. In a lubricating system, a pair of lines into which iluid under pressure is to be delivered alternately, a pump connected to said lines for supplying iiuid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, means operable by said valve motor for stopping itself and closing the pump motor circuit, a pressure-operated control valve connected to said lines and having parts movable by pressure in said lines, and switches at said control valve engageable respectively by said parts and adapted each to open said pump motor circuit when engaged by said parts.

15. In a lubricating system, a pair of lines into which uid under pressure is to be delivered alternately, a pump connected to said lines for supplying uid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a motor for operating said valve, means for starting motor activity, a pump motor for driving said pump, a cam operated by said valve motor, normally open switches at opposite sides of said cam connected respectively in the pump motor circuit and adapted to be closed selectively when said valve has been moved to an open position, whereby to start said pump motor, means whereby either of said switches opens said valve motor circuit when closed by said cam, a pressure operated control valve connected to said lines and having parts movable by pressure in said lines, and switches at said control valve engageable respectively by said parts and adapted each to open said starting relay when engaged by said parts.

16. In a lubricating system, a pair of lines into which fluid under pressure is to be delivered alternately, a plurality of measuring valves connected to said lines, a pump connected to said lines for supplying uid thereto, a valve inserted between said pump and said lines for connecting said pump to said lines in alternation, a control valve connected to said lines and operable by a predetermined pressure in either one of said lines, means for reversing the first named valve on actuation of said control valve, and an adjustable volume device connected to said lines for regulating the time required for the development of the predetermined pressure in said lines.

17. In a, lubricating system, a pressure actuated control valve in fluid communication with the system and operable by predetermined pressure therein, said valve being adapted to control means determining the direction of lubricant iiow in the system, and an adjustable volume device conintofmhelnuidf-uuderpressure. isnto. be delivered and` ald,-1` Y altematiom, a; control Valve connected.

operable: by a...predetermned` 5;; pessmfefinyethe line, and means forl reversig www@ te seid lmesf an.

thegistllame sla-Neon actuation of saidA controlV valve-51 Y f WILLIAMIK". HAWKSQQ' 

